Stone-cutting tool.



A, B ARBAGELAT. STONBUUTTING TOOL. PPLIOATION 1111.51) rms: 1e, 1909..

' 930,71 8. Patented Aug. 1o, 1909.

ANDREW, s. Gamm C0.. Puowumoamrnm. wAsHlNaoN, n a

ANGELO BARBAGELAT,` OF QUINCY, MASSACHUSETTS.

STONE-CUTTING TOOL.

To all whom it may concern.'

Be it known that I, ANGELO BARBAGELAT, of Quincy, in the county of Norfolk and State of Massachusetts, have invented certain new and useful 1m rovements in Stone- Cutting Tools, of Whic the following is a specification, reference being had to the accom anying drawings, forming part thereof.

T is invention has reference to improvements in stone cutting tools and particularly to drills.

The object of the invention is to so construct a stone cutting tool adapted for operation by a pneumatic hammer or similar reciprocating means that drill points movably mounted in said tool may be securely held from accidental displacement.

The invention consists in` the peculiar means for holding the drill points from accidental loosening.

The invention also consists in such other novel features of construction and combination of parts as shall hereinafter be more fully described and pointed out in the claims.

Figure 1, represents a sectional view of the improved tool taken on line 1-1 Fig. 4. Fig. 2, represents a detail view of one of the Wedge members in side elevation. Fig. 3, represents a detail view of the other of the wedge members in side elevation. Fig. 4, represents a bottom plan view of the tool.

Similar numbers of reference designate corresponding parts throughout.

As shown in the drawing in its preferred form 5 represents a tubular shank of suitable cross sectional shape and of substantial construction which is or may be ada ted to be secured to an ordinary pneumatic ammer or other suitable reciprocating device of suitable and well known construction. of the shank 5 is referably closed and to the other end thereoiLP is secured, or made in part with said shank, the holding frame 6 having the wall 7 which embraces a suitably shaped compartment 8. The guide rod 9 has at one end the head 10, of a diameter less than that of the bore of the shank 5, and at the other end the wedge member 11 having its thinnest ortion nearest the rod 9. The wedge memfier 12 has its thicker edge 13 adjacent the frame 14 which has the collar 15 integral with said frame 14 and freely movable on said guide rod 9 While the vhammer 16 is slidably mounted on said guide and is adapted to be received by the bore of the Specication of Letters Fatent.

Application filed February 16, 1909.

One end Patented Aug. 10, 1909.

Serial No. 478,281.

shank 5. Drill points 1717 of any suitable vsizeand shape adapted to be received by the frame 6 are used with this' tool and any number of said drill points or cutters may be utilized.

In preparing the tool for operation the frame 6 is preferably held uppermost and thc hammer 16, with its guide rod, is inserted in the bore of the shank 5 and in such position the hammer 16 and the wedge member 12 slide toward the head 10, the movement of l said wedge member being however limited by the frame 6 so that the thin edge of wedge member 12 is intermediate the length of Wedge member 11. The drill points 17-17 are now inserted in compartment 8 between the wedge members 11 vand 12 and the wall 7 and fit the same closely so that they are held in position by frictional contact. The position of the tool is now reversed and, preferably, is given a sharp blow in a direction to impel the hammer 16 against the collar 15 of wedge member 12 whereby said Wedge member is driven between the series of drill points in contact therewith and the other wedge member 11 and tends to spread said parts and thus press outwardly all of the drill points against the wall 7 and thus more effectually secure the same.

1n the operation of the tool under rapid reciprocation the hammer 16 is operated coincidently and as a result of such operation striking alternately the head 10 and the collar 15 and thus tending at each blow to so move said parts relatively as to the wedge members 11 and 12 one on the other.

The removal of the drill points from the compartment 8 is Veffected by driving the Wedge member 12 inward sufliciently to release said drill points.

Having thus described my invention I claim as new and desire to secure by Letters Patent. Y

1. A tool having a compartment a series of cutting devices having parts located in said compartment, a wedge bearing against said cutting devices to press them against rigid members of said compartment, and movable means, adapted to be brought into action by the movement of the tool, to effect the tightening of said wedge, as described.

2. A tool of the nature described comprising means for embracing a series of drill points, such points, a wedge acting to spread said points into holding contact with said embracing means, and a hammer loosely mounted and adapted to act on said wedge to drive the same in a direction to spread said drill points.

3. The combination with a tubular shank having at one end a holding frame adapted to receive tools, of a Wedge movabljfv mounted in said frame and adapted to effect the spreading` of said tools into holding Contact with said frame, and means freely movable in'said tubular shank and adapted t0 bear on said Wedge to tighten the same.

4. The 'combination with the 'tubular slia'nk 'having the holding frame, of a Wedge member having a rod located in the bore ol said shank and having' a head, a second Wedge member movable with respect to the irst mentioned wedge meunier and having an extension movablv located in the here oi' said shank, and a hammer slidably mounted in said bore and adapted to strike the head of said rod, when moving in one direction, and the extension 0l' said second wedge meinber when moving` in the other direction, suhstantiallj/ as described.

ANGELO BARBAG li) LAT. i/Vitn esses HENRY J. MILLER., M. M. lzlAnniNG'roN. 

